"Additionally, injected rapid-acting insulin can take between four to eight hours to leave the system, sometimes resulting in hypoglycemia, which is listed as a serious concern for diabetics," says Frost

An automatic system would be able to detect these drops in sugar, called hypoglycemia, and hold off giving insulin, which would drop the sugar levels even lower. children and adolescents who had type 1 diabetes and their blood sugar levels while using both the closed-loop system and the standard pump.